2x^2-(x-2)(x+3)=(m+2n)(2m+n)-(3m-n)(m+2n)=(x-y)(5x-3y+4z)=(x-5)(x+4)=(y-1)(y+3)=先化简,再求值(3x-2)(x-3)-2(x+6)(x-5)+3(x^2-7x+13) 其中x=3/1/2.(3a+1)(2a-3)(6a-5)(a-4)

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2x^2-(x-2)(x+3)=(m+2n)(2m+n)-(3m-n)(m+2n)=(x-y)(5x-3y+4z)=(x-5)(x+4)=(y-1)(y+3)=先化简,再求值(3x-2)(x-3)-2(x+6)(x-5)+3(x^2-7x+13) 其中x=3/1/2.(3a+1)(2a-3)(6a-5)(a-4)
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2x^2-(x-2)(x+3)=(m+2n)(2m+n)-(3m-n)(m+2n)=(x-y)(5x-3y+4z)=(x-5)(x+4)=(y-1)(y+3)=先化简,再求值(3x-2)(x-3)-2(x+6)(x-5)+3(x^2-7x+13) 其中x=3/1/2.(3a+1)(2a-3)(6a-5)(a-4)
2x^2-(x-2)(x+3)=
(m+2n)(2m+n)-(3m-n)(m+2n)=
(x-y)(5x-3y+4z)=
(x-5)(x+4)=
(y-1)(y+3)=
先化简,再求值
(3x-2)(x-3)-2(x+6)(x-5)+3(x^2-7x+13) 其中x=3/1/2.
(3a+1)(2a-3)(6a-5)(a-4) 其中a=-2

2x^2-(x-2)(x+3)=(m+2n)(2m+n)-(3m-n)(m+2n)=(x-y)(5x-3y+4z)=(x-5)(x+4)=(y-1)(y+3)=先化简,再求值(3x-2)(x-3)-2(x+6)(x-5)+3(x^2-7x+13) 其中x=3/1/2.(3a+1)(2a-3)(6a-5)(a-4)
(3x-2)(x-3)-2(x+6)(x-5)+3(x^2-7x+13) 其中x=3/1/2.
(3a+1)(2a-3)(6a-5)(a-4) 其中a=-2

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